<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        
    </style>
</head>
<body>
    
</body>
<script>
    var a = 10;
    console.log(a);
    a = a + 3;
    console.log(a);
    a += 3;
    console.log(a);
    a -= 3;
    console.log(a);
    a *= 3;
    console.log(a);
    a /= 3;
    console.log(a);
    a %= 3;
    console.log(a);

</script>
</html>